There is a glitch where if you start fighting a leader, open up the leader menu, then select a different leader before (or when) the first is defeated, the game thinks you have defeated the second leader instead of the first. This can be used to defeat leaders much sooner than intended.
Having completed the game a few times, I'd like to see either some sort of alternate dungeon with different enemy types/configurations or some sort of character select at the beginning with different deck options. I think a knight character with a bunch of knight cards but limited ability in some other way would be fun.
 "Idle Pins"){kind=icon}
 "Pawnbarian"){kind=icon}
 "Blocco"){kind=icon}
 "Necrophobia"){kind=icon}
 "Hill of the King"){kind=icon}
 "Epic Combo!"){kind=icon}
 "Idle Recruit"){kind=icon}
Hi! Just updated the game, it should feel a bit more challenging now :)